/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineExternalUIInterface.h
Displays an informational system dialog.
virtual bool ShowPlatformMessageBox ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & UserId, [EPlatformMessageType](API\Plugins\OnlineSubsystem\Interfaces\EPlatformMessageType) MessageType )